如何通过命令行从当前APK屏幕查询FLAG_SECURE？ [英] How to query FLAG_SECURE from current APK screen via command line?

问题描述

如何查询Android应用程序的当前窗口/活动以检查窗口标记 FLAG_SECURE？

How can I query against the current window/activity of an android app to check window flag FLAG_SECURE? Is this possible using ADB or any other command line tool against an APK?

我的用例是：我想查询设备以查看是否在FLAG_SECURE上启用了FLAG_SECURE。当前屏幕。我无权访问源代码，我只是使用APK作为黑匣子验收测试仪。

My use case is: I would like to query the device to see if FLAG_SECURE is enabled on the current screen. I do not have access to source code, I am just working with an APK as a black box acceptance tester.

请注意，此其他问题类似且未得到回答： Android-窗口标志

Note that this other question is similar and unanswered: Android - Window Flags

推荐答案

您可以通过仅检查窗口中的 mAttr 行来确定某个特定窗口是否设置了 FLAG_SECURE 。 dumpsys窗口< window id> 输出：

You can find out if some specific window has the FLAG_SECURE set by just checking mAttr line in the dumpsys window <window id> output:

~$ dumpsys window com.android.settings | grep '   mAttrs='
    mAttrs=WM.LayoutParams{(0,0)(fillxfill) sim=#20 ty=1 fl=#85810100 pfl=0x20000 wanim=0x103046a vsysui=0x700 needsMenuKey=2}

fl = 的值是 WindowManager.LayoutParams（）。flags 以十六进制表示。 FLAG_SECURE 是一个值为 0x2000 的位掩码。这是在 adb shell 中进行检查的方法：

The fl= value is the WindowManager.LayoutParams().flags of that window in hex. FLAG_SECURE is a bitmask with the value of 0x2000. This is how you can check it right in the adb shell:

for f in $(dumpsys window com.android.settings | grep '   mAttrs=' | grep -o ' fl=#[^ ]*'); do [[ $((16#${f#*#}&8192)) -ne 0 ]] && echo 'FLAG_SECURE is set' || echo 'FLAG_SECURE is not set'; done

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